62% of all apps downloaded last month were owned by Facebook

Most people only use a few apps on their smartphones: according to research, smartphone owners spend 80% of their time in their three most-used apps.

And as the app market matures, it turns out those three apps are usually owned by Facebook, at least according to download statistics.

According to research by Nomura based on Sensor Tower data, looking at both iPhone and Android app stores, Facebook apps accounted for more than 60% of all app downloads last month.

Here's the chart: Nomura

This means that during May, Facebook, Instagram, Messenger, and Whatsapp combined to account for more downloads than every other app combined— millions of apps from millions of companies and other developers, including Google. (Apple isn't included because its apps aren't downloaded, but preinstalled on iPhones instead.)

As Nomura researchers write, "Facebook is the clear leader in mobile," although its download rates have been slipping lately.